Pen



FIG. 1 is an isometric view of a pen showing my new design;

FIG. 2 is a front elevational view in an exploded condition;

FIG. 3 is a left side elevational view of FIG. 2;

FIG. 4 is a right side elevational view of FIG. 2;

FIG. 5 is a rear elevational view of FIG. 2;

FIG. 6 is a top view with a cap removed;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top view of the cap thereof;

FIG. 9 is a bottom plan view of FIG. 1 ; and,

FIG. 10 is an isometric view in and exploded condition. 

The ornamental design for a pen, as shown and described. 